convert SwTxtNode::GetLang from xub_StrLen->sal_Int32

Change-Id: I2740622a5e30916d050e01350208a0de268e42ac

sw/inc/ndtxt.hxx

@@ -661,7 +661,7 @@ public:
 
     void fillSoftPageBreakList( SwSoftPageBreakList& rBreak ) const;
 
-    sal_uInt16 GetLang( const xub_StrLen nBegin, const xub_StrLen nLen = 0,
+    sal_uInt16 GetLang( const sal_Int32 nBegin, const sal_Int32 nLen = 0,
                     sal_uInt16 nScript = 0 ) const;
 
     /// in ndcopy.cxx

sw/source/core/txtnode/thints.cxx

@@ -3352,7 +3352,7 @@ void SwTxtNode::ClearSwpHintsArr( bool bDelFields )
     }
 }
 
-sal_uInt16 SwTxtNode::GetLang( const xub_StrLen nBegin, const xub_StrLen nLen,
+sal_uInt16 SwTxtNode::GetLang( const sal_Int32 nBegin, const sal_Int32 nLen,
                            sal_uInt16 nScript ) const
 {
     sal_uInt16 nRet = LANGUAGE_DONTKNOW;

sw/source/ui/index/swuiidxmrk.cxx

@@ -322,7 +322,7 @@ void    SwIndexMarkPane::UpdateLanguageDependenciesForPhoneticReading()
         OSL_ENSURE(pTxtNode, "need current SwTxtNode");
         if(!pTxtNode)
             return;
-        xub_StrLen nTextIndex = *pTxtTOXMark->GetStart();
+        sal_Int32 nTextIndex = *pTxtTOXMark->GetStart();
         nLangForPhoneticReading = pTxtNode->GetLang( nTextIndex );
     }
     else //if dialog is opened to create a new mark